public Set possibleTypes() {
if (subsets == null) {
return Collections.EMPTY_SET;
}
HashSet ret = new HashSet();
for (Iterator subsetIt = subsets.iterator(); subsetIt.hasNext(); ) {
final PointsToSet subset = (PointsToSet) subsetIt.next();
ret.addAll(subset.possibleTypes());
}
return ret;
}
public boolean addAll(PointsToSet s) {
boolean ret = false;
if (subsets == null) subsets = new HashSet();
if (s instanceof Union) {
MemoryEfficientRasUnion meru = (MemoryEfficientRasUnion) s;
if (meru.subsets == null || subsets.containsAll(meru.subsets)) {
return false;
}
return subsets.addAll(meru.subsets);
} else {
PointsToSet r = (PointsToSet) s;
return subsets.add(s);
}
}